Electrical controlling apparatus.



0. H. & A. F. PIEPER. ELECTRICAL CONTROLLING APPARATUS.

APPLICATION FILED Nov, 4,1912

Patented Sept. 22, 1.914.

Oscar/[Fo'p 6 7" H vii/012661112 6670? 351 m UNITED STATES PATENTOFFICE.

OSCAR H. PIEPER AND ALPHONSE F. PIEPER, OF ROCHESTER, NEW YORK.

/ ELECTRICAL CONTROLLING APPARATUS.

Specification of Letters Patent.

Application filed November 4, 1912.

companying drawings. forming a part of this specification, andto thereference-numerals marked thereon.

The present invention relates to improvements in electrical. controllingapparatus, and more particularly tothat class of controllers illustratedin Patent No. ($75,294:, May 28. 1901, for regulating the motors ofdental engines, and it has for its object to provide an improvedapparatus for more readily controlling the stopping, starting, anddifferent speeds of a motor and for adapting the apparatus so that thecontrolling lever will be automatically returned to its normal positionwhen released, or will be automatically held in any adjusted position,according to the needs of the operator.

To these and other ends the invention consists in certain improvementsand combinations of parts all as will be hereinafter more fullydescribed, the novel features being pointed out in the claims at the endof the specification.

In the drawings: Figure 1 is a plan view of a controlling apparatusequipped with a preferred embodiment of the invention; Fig. 2 is a sideelevation of the same; Fig. 3 is a plan view with the cover plateremoved;

Fig. 4 is a similar View, showing the controlling lever in one of itsadjusted positions: Fig. 5 is a sectional view taken vertically throughone of the locking devices, and showing the latter in raised position;Fig. 6 is a similar view showing the locking device lowered, and Fig. 7is a detail view showing the locking device held in its lowermostposition.

Similar reference numerals throughout the several figures indicate thesame parts.

In the present embodiment of the invention. 1 designates the casing, and2 the controlling lever which is pivoted centrally of the casing to turnon a vertical axis and suitably connected with the contacts of thecontrolling apparatus in a manner which is well known in the art.

3 is a supporting plate upon which the spring controlled arms 4 a repivotally mounted at 4, the arms being-connected by a spring andprovided with oppositely disposed inclined surfaces 6 which engage aprojection T mounted upon the controlling lever 2 whereby the level-isheld in its nor- .mal position as in Fig. 3. The lever 2 also carries asecond projection 8 which is arranged to engage a second pair of springcontrolled arms. for the purpose of holding the lever in any one of itsadjusted positions, as will now be described. To this end. a post 9 issecured in the supporting plate 3 and has pivotally nuumtcdthcreon thearms 10 which may be curved as shown, and preferably formed withcorrugations or depressions which receive the projection S as the leveris turned. Abutments 11 are arranged upon the supporting plate in thepath of the arms 10 to limit the out -'ard movement of the latter, saidarms being controlled by the spring 12 which is mounted upon the post 8and engages projections 13 secured to the respective arms.

In some instances, it is desirable to render, .the arms 10 inoperativewith respect to the controlling lever, so that the latter will bereturned to its normal position as soon as re leased, and to this end,we provide locking devices arranged to engage the curved arms and tomove them out of cooperative relation with the controlling lever, saidarms being held in such inoperative position until the locking devicesare released. This may be accomplished in different ways, and in thepresent embodiment there is shown a preferred arrangement consisting oflocking devices preferably embodying the pins 14 having heads 15 andbeveled ends 16, said pins being arranged for vertical movement in thecover plate 17 and held normally in raised position by means of springs18 which are housed in the recesses 19 of the pins and engagecooperating shoulders 20 on the cover plate.

The pins 1.4 carry the projections 21 which limit their upward movementand also serve to lock the pins in their lowermost position in thefollowing manner: 22 are collars formed on the lower side of the coverplate to receive the locking pins, said collars being cut away to formcam surfaces 23 which terminate in recesses 21 at the base thereof. Bydepressing the locking pins and rotating them simultaneously, theprojections 21 may be brought into engagement with the recesses 24, andthe pins are thereby held in their lowermost position to lock the curvedarms out of engagement with the controlling lever. The free ends of thecur ed arms, designated at have beveled edges 26 which. are adapted tobe engaged by the beveled ends 16 of the locking members, as shown inFigs. and t and when the locking members are depressed, the arms aremoved to the position shown in dotted lines in Fig. 4. By thisconstruction, either one or both of the curved arms may be locked ininoperative position, leaving the controlling lever free to be returnedto its normal position under the action of the arms 4, and

when the curved arms are operating, the

rontrolling lever may be held automatically in any position ofadjustment, to obtain different speeds of the motor, while at the sametime requiring only a slight pressure of the foot to release the same.

It is to be understood that the invention is not limited to theparticular construction and arrangement set forth, andwe intend to coverby this application any modification that may come within the purpose ofthe invention and the scope of the claims hereinafter.

\Ve claim as our invention:

1. In a controlling apparatus, the combination with a lever, of pivotedSpringoperated arms cooperating with said lever, said arms having theedges of their free ends beveled, and vertically movable pins providedwith beveled portions adapted to engage said edges on the arms to movethe latter out of cooperative relation with the lever.

.2. In a controlling apparatus, the combination with a pivoted lever, ofpivoted spring-operated arms having opposing converging surfacescooperating with the lever, additional pivoted spring-operated armshaving corrugated surfaces cooperating with the lever, the lastmentioned arms having free ends provided with beveled edges, and lockingpins vertically movable relatively to said arms and having beveledportions cooperating with said beveled edges to move the arms out ofengagement with said lever.

3. In a controlling apparatus, the combination with a pivoted lever, ofpivoted spring-operated arms having opposing converging surfacescooperating with the lever, additional pivoted spring-operated armshaving corrugated surfaces cooperating with the lever, and movablelocking devices cooperating with the free ends of the last mentionedarms to move them out of engagcmcnt with said lever.

lln a controlling apparatus, the combination with a pivoted lever havingindependent projections thereon, of spring-operated arms pivoted onseparate axes and having opposing converging surfaces 00- operating withone of said projections, adi'litional spring-operated arms havingcorrugated surfaces, the last mentioned arms being pivoted on the sameaxis and cooperating with the other of said projections on the lever,and vertically movable locking devices cooperating with the free ends ofthe last mentioned arms to move them out of engagement with the lever.

5. In a controlling apparatus, the combination with a pivoted lever, ofpivoted spring-operated arms having opposmg converging surfacescooperating with the lever, additional pivoted spring-operated armscooperating with the lever and vertically movable locking devicescooperating with the free ends of the last mentioned arms to move themout of engagement with said lever.

OSCAR H. PIEPER. ALPHONSE F. PIEPER. \Vitnesses:

R. L. FITCH, R. W. STEWART.

